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* Copyright (C) 2006 Smartjog S.A.S, Baptiste Coudurier <>
* Copyright (C) 2011 Smartjog S.A.S, Clément Bœsch <>
* This file is part of FFmpeg.
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* @file
* Timecode helpers header
* This *private* API is deprecated, please use the one available in libavutil instead.
#include "version.h"
#include <stdint.h>
#include "avcodec.h"
#include "libavutil/rational.h"
#define TIMECODE_OPT(ctx, flags) \
"timecode", "set timecode value following hh:mm:ss[:;.]ff format, " \
"use ';' or '.' before frame number for drop frame", \
offsetof(ctx, tc.str), \
struct ff_timecode {
char *str; ///< string following the hh:mm:ss[:;.]ff format
int start; ///< timecode frame start
int drop; ///< drop flag (1 if drop, else 0)
AVRational rate; ///< Frame rate in rational form
* @brief Adjust frame number for NTSC drop frame time code
* @param frame_num Actual frame number to adjust
* @return Adjusted frame number
* @warning Adjustment is only valid in NTSC 29.97
int avpriv_framenum_to_drop_timecode(int frame_num);
* @brief Convert frame id (timecode) to SMPTE 12M binary representation
* @param frame Frame number
* @param fps Frame rate
* @param drop Drop flag
* @return The actual binary representation
uint32_t avpriv_framenum_to_smpte_timecode(unsigned frame, int fps, int drop);
* @brief Load timecode string in buf
* @param buf Destination buffer
* @param tc Timecode struct pointer
* @param frame Frame id (timecode frame is computed with tc->start+frame)
* @return a pointer to the buf parameter
* @note timecode representation can be a negative timecode and have
* more than 24 hours.
* @note buf must have enough space to store the timecode representation: 16
* bytes is the minimum required size.
char *avpriv_timecode_to_string(char *buf, const struct ff_timecode *tc, unsigned frame);
* Check if timecode rate is valid and consistent with the drop flag.
* @return 0 on success, negative value on failure
int avpriv_check_timecode_rate(void *avcl, AVRational rate, int drop);
* Parse SMTPE 12M time representation (hh:mm:ss[:;.]ff). str and rate fields
* from tc struct must be set.
* @param avcl A pointer to an arbitrary struct of which the first field is a
* pointer to an AVClass struct (used for av_log).
* @param tc Timecode struct pointer
* @return 0 on success, negative value on failure
* @warning Adjustement is only valid in NTSC 29.97
int avpriv_init_smpte_timecode(void *avcl, struct ff_timecode *tc);
attribute_deprecated int ff_framenum_to_drop_timecode(int frame_num);
attribute_deprecated uint32_t ff_framenum_to_smtpe_timecode(unsigned frame, int fps, int drop);
attribute_deprecated int ff_init_smtpe_timecode(void *avcl, struct ff_timecode *tc);
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